Glass for diffusion layer in organic LED element, and organic LED element utilizing same

An organic LED element sequentially comprising:

• a substrate;
• a scattering layer;
• a first electrode;
• an organic layer;
• and
• a second electrode,
• wherein the scattering layer comprises a base material and one or more kinds of scattering materials being dispersed in the base material and having a different refractive index from the base material, and
• the base material comprises a glass containing, in terms of mol % on the basis of oxides, 0˜20% of P2O5, 15˜60% of B2O3, 15˜28% of Bi2O3, and 20˜50% of ZnO, in which a value obtained by dividing the content of P2O5 by the content of ZnO is less than 0.48, the sum of the contents of P2O5 and B2O3 is 30˜60%, the content of P2O5 is 10% or less when the sum of the contents of P2O5 and B2O3 exceeds 50%, and the glass does not substantially contain lead (PbO or Pb3O4), Li2O, Na2O and K2O, except for those contained as impurities.

A glass for a scattering layer of an organic LED element, which contains, in terms of mol % on the basis of oxides, 0˜20% of P2O5, 15˜60% of B2O3, 10-37% of Bi2O3, 5˜50% of ZnO, 0˜20% of SiO2, 0˜10% of Al2O3, 0˜5% of ZrO2, 0˜10% of Gd2O3, 0˜15% of TiO2, and 0˜10% of the total of MgO, CaO, SrO and BaO,

• wherein a value obtained by dividing the content of P2O5 by the content of ZnO is less than 0.48,
• the sum of the contents of P2O5 and B2O3 is 30˜60%,
• the content of P2O5 is 10% or less when the sum of the contents of P2O5 and B2O3 exceeds 50%, and
• the glass does not substantially contain lead (PbO or Pb3O4), Li2O, Na2O and K2O, except for those contained as impurities.

An organic LED element sequentially comprising:

• a substrate;
• a scattering layer;
• a first electrode;
• an organic layer;
• and
• a second electrode,
• wherein the scattering layer comprises a base material and one or more kinds of scattering materials being dispersed in the base material and having a different refractive index from the base material, and
• the base material contains, in terms of mol % on the basis of oxides, 0˜20% of P2O5, 15˜60% of B2O3, 10˜37% of Bi2O3, 5˜50% of ZnO, 0˜20% of SiO2, 0˜10% of Al2O3, 0˜5% of ZrO2, 0˜10% of Gd2O3, 0˜15% of TiO2 and 0˜10% of the total of MgO, CaO, SrO and BaO, in which a value obtained by dividing the content of P2O5 by the content of ZnO is less than 0.48, the sum of the contents of P2O5 and B2O3 is 30˜60%, the content of P2O5 is 10% or less when the sum of the contents of P2O5 and B2O3 exceeds 50%, and the base material does not substantially contain lead (PbO or Pb3O4), Li2O, Na2O and K2O, except for those contained as impurities.